Evidence supporting the use of: Sardines
For the health condition: Muscle Tone (lack of)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Sardines are a nutrient-dense food that contains several components important for muscle tone and function, notably high-quality protein, vitamin D, calcium, and omega-3 fatty acids. Scientific evidence suggests that dietary protein is essential for muscle maintenance, repair, and growth, particularly in individuals experiencing muscle tone loss due to aging (sarcopenia) or inactivity. Sardines provide all essential amino acids, making them a complete protein source. They are also rich in omega-3 fatty acids (EPA and DHA), which have been shown to reduce muscle inflammation and may support muscle protein synthesis. Additionally, sardines are one of the best dietary sources of vitamin D and calcium, both vital for muscle contraction and neuromuscular function.

While there are no direct clinical trials specifically using sardines as a treatment for lack of muscle tone, the consumption of nutrient-rich fish (like sardines) is associated with better muscle health outcomes in epidemiological studies. For example, a study published in the American Journal of Clinical Nutrition found that higher fish and protein intake correlated with greater muscle mass and strength in older adults. Thus, the scientific rationale for using sardines to support muscle tone is based on their nutrient profile and the established roles of those nutrients in muscle health, rather than on specific trials of sardines themselves. The evidence is moderate, not strong, warranting a rating of 3 out of 5.

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